The INSIDER Summary:

Charlize Theron and Tom Hardy didn't like each other on the "Mad Max: Fury Road" set.

Zoe Kravitz spoke out about the "feud."

She said it was because they were in the desert for so long and everyone was homesick.

Theron has also laughed off the feud.

One of the most surprising critical darlings of 2015 was George Miller's explosive "Mad Max: Fury Road." Starring Tom Hardy and Charlize Theron, "Fury Road" went on to the one of the biggest financial successes of the year, while also picking up some award nominations along the way.

But while the release of the film was massively successful, it wasn't all rainbows and sunshine on set. Theron and Hardy have been long rumored to have had a feud while working on "Mad Max," and now their co-star Zoe Kravitz has opened up about the main issue. And it turns out that the unforgiving nature of the set was likely a key factor in the duo's not so dynamic relationship.

Zoe Kravitz recently appeared alongside Ilana Glazer on "Watch What Happens Live!" in order to promote their new comedy "Rough Night." Host Andy Cohen took caller questions during their show, where a fan asked about the feud between Tom Hardy and Charlize Theron. Kravitz elaborated a bit on the situation, saying:

They didn't get along. We were also in the desert for so long. I think everyone was tired, and confused, and homesick. We saw nothing but sand for six months. You go crazy, you do. I actually don't know if there was one issue. I just think it was like they weren't vibing.

Sometimes it's as simple as two different personalities and six months in a desert. We've all been there, right?

Tom Hardy.
Jasin Boland/Warner Bros.

Hollywood feuds are strangely satisfying for audiences, who get to see some vulnerability from celebrities. Oodles of people have one or two co-workers that they simply don't get along with, so why should actors being any different? And if you were stuck working in close proximity with those work foes for months at a time, it makes sense that any small annoyances would suddenly become a chasm of divide.

Following rumors of the lead actors' feud, Charlize Theron actually got candid about how Tom Hardy was simply not easy to work with on "Mad Max: Fury Road." In earlier interviews about the subject, Theron laughed off their feud, saying that she'd heard plenty of actors express that Hardy was easy to work with, and that perhaps the logistics of their roles and setting may have affected him.

Then again, not every pair of actors needs to be best friends. Their lack of a relationship certainly didn't negatively affect the film itself, as "Mad Max: Fury Road" is massively popular to this day.

You can currently catch Zoe Kravitz in "Rough Night," in theaters today.